<template>
  <div>
         <!-- 面包屑 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>数据统计</el-breadcrumb-item>
      <el-breadcrumb-item>数据报表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图区域 -->
    <el-card>
        <div id="main" style="width: 750px;height:400px;"></div>
    </el-card>
  </div>
</template>

<script>
// 1.先在依赖中安装echarts，在导入
import * as echarts from 'echarts'
import {getReports} from '@/api'
import _ from 'lodash'
export default {
    name:'Report',
    data() {
        return {
            //需要合并的数据
            options: {
                title: {
                text: '用户来源'
                },
                tooltip: {
                trigger: 'axis',
                axisPointer: {
                    type: 'cross',
                    label: {
                    backgroundColor: '#E9EEF3'
                    }
                }
                },
                grid: {
                left: '3%',
                right: '4%',
                bottom: '3%',
                containLabel: true
                },
                xAxis: [
                {
                    boundaryGap: false
                }
                ],
                yAxis: [
                {
                    type: 'value'
                }
                ]
            }
        }
    },
    created(){},
    methods:{},
    // 此时页面上的元素已经渲染完毕
    mounted(){
        // 3.基于准备好的dom，初始化echarts实例
        var myChart = echarts.init(document.getElementById('main'));
        getReports().then(({data:res})=>{
            if(res.meta.status !== 200){
                return this.$message.error('获取折现图数据失败')
            }
            console.log(res);
            // 4.准备数据和配置项
            // 合并数据，用lodash,
            const result = _.merge(res.data,this.options)
            // 5.使用刚指定的配置项和数据显示图表。
            myChart.setOption(result);
        })  
    }
}
</script>

<style>

</style>